add support for DHGEX

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>
This commit is contained in:
Nicola Murino 2022-11-17 18:15:53 +01:00
parent 67de4c9c07
commit a22282f275
No known key found for this signature in database
GPG key ID: 935D2952DEC4EECF
9 changed files with 115 additions and 39 deletions

View file

@ -129,7 +129,8 @@ The configuration file contains the following sections:
- `host_keys`, list of strings. It contains the daemon's private host keys. Each host key can be defined as a path relative to the configuration directory or an absolute one. If empty, the daemon will search or try to generate `id_rsa`, `id_ecdsa` and `id_ed25519` keys inside the configuration directory. If you configure absolute paths to files named `id_rsa`, `id_ecdsa` and/or `id_ed25519` then SFTPGo will try to generate these keys using the default settings.
- `host_certificates`, list of strings. Public host certificates. Each certificate can be defined as a path relative to the configuration directory or an absolute one. Certificate's public key must match a private host key otherwise it will be silently ignored. Default: empty.
- `host_key_algorithms`, list of strings. Public key algorithms that the server will accept for host key authentication. The supported values are: `rsa-sha2-512-cert-v01@openssh.com`, `rsa-sha2-256-cert-v01@openssh.com`, `ssh-rsa-cert-v01@openssh.com`, `ssh-dss-cert-v01@openssh.com`, `ecdsa-sha2-nistp256-cert-v01@openssh.com`, `ecdsa-sha2-nistp384-cert-v01@openssh.com`, `ecdsa-sha2-nistp521-cert-v01@openssh.com`, `ssh-ed25519-cert-v01@openssh.com`, `ecdsa-sha2-nistp256`, `ecdsa-sha2-nistp384`, `ecdsa-sha2-nistp521`, `rsa-sha2-512`, `rsa-sha2-256`, `ssh-rsa`, `ssh-dss`, `ssh-ed25519`. Default values: `rsa-sha2-512-cert-v01@openssh.com`, `rsa-sha2-256-cert-v01@openssh.com`, `ecdsa-sha2-nistp256-cert-v01@openssh.com`, `ecdsa-sha2-nistp384-cert-v01@openssh.com`, `ecdsa-sha2-nistp521-cert-v01@openssh.com`, `ssh-ed25519-cert-v01@openssh.com`, `ecdsa-sha2-nistp256`, `ecdsa-sha2-nistp384`, `ecdsa-sha2-nistp521`, `rsa-sha2-512`, `rsa-sha2-256`, `ssh-ed25519`.
- `kex_algorithms`, list of strings. Available KEX (Key Exchange) algorithms in preference order. Leave empty to use default values. The supported values are: `curve25519-sha256`, `curve25519-sha256@libssh.org`, `ecdh-sha2-nistp256`, `ecdh-sha2-nistp384`, `ecdh-sha2-nistp521`, `diffie-hellman-group14-sha256`, `diffie-hellman-group16-sha512`, `diffie-hellman-group18-sha512`, `diffie-hellman-group14-sha1`, `diffie-hellman-group1-sha1`. Default values: `curve25519-sha256`, `curve25519-sha256@libssh.org`, `ecdh-sha2-nistp256`, `ecdh-sha2-nistp384`, `ecdh-sha2-nistp521`, `diffie-hellman-group14-sha256`. SHA512 based KEXs are disabled by default because they are slow.
- `moduli`, list of strings. Diffie-Hellman moduli files. Each moduli file can be defined as a path relative to the configuration directory or an absolute one. If set, `diffie-hellman-group-exchange-sha256` and `diffie-hellman-group-exchange-sha1` KEX algorithms will be available, `diffie-hellman-group-exchange-sha256` will be enabled by default if you don't explicitly set KEXs. Default: empty.
- `kex_algorithms`, list of strings. Available KEX (Key Exchange) algorithms in preference order. Leave empty to use default values. The supported values are: `curve25519-sha256`, `curve25519-sha256@libssh.org`, `ecdh-sha2-nistp256`, `ecdh-sha2-nistp384`, `ecdh-sha2-nistp521`, `diffie-hellman-group14-sha256`, `diffie-hellman-group16-sha512`, `diffie-hellman-group18-sha512`, `diffie-hellman-group14-sha1`, `diffie-hellman-group1-sha1`. Default values: `curve25519-sha256`, `curve25519-sha256@libssh.org`, `ecdh-sha2-nistp256`, `ecdh-sha2-nistp384`, `ecdh-sha2-nistp521`, `diffie-hellman-group14-sha256`. SHA512 based KEXs are disabled by default because they are slow. If you set one or more moduli files, `diffie-hellman-group-exchange-sha256` and `diffie-hellman-group-exchange-sha1` will be available.
- `ciphers`, list of strings. Allowed ciphers in preference order. Leave empty to use default values. The supported values are: `aes128-gcm@openssh.com`, `aes256-gcm@openssh.com`, `chacha20-poly1305@openssh.com`, `aes128-ctr`, `aes192-ctr`, `aes256-ctr`, `aes128-cbc`, `aes192-cbc`, `aes256-cbc`, `3des-cbc`, `arcfour256`, `arcfour128`, `arcfour`. Default values: `aes128-gcm@openssh.com`, `aes256-gcm@openssh.com`, `chacha20-poly1305@openssh.com`, `aes128-ctr`, `aes192-ctr`, `aes256-ctr`. Please note that the ciphers disabled by default are insecure, you should expect that an active attacker can recover plaintext if you enable them.
- `macs`, list of strings. Available MAC (message authentication code) algorithms in preference order. Leave empty to use default values. The supported values are: `hmac-sha2-256-etm@openssh.com`, `hmac-sha2-256`, `hmac-sha2-512-etm@openssh.com`, `hmac-sha2-512`, `hmac-sha1`, `hmac-sha1-96`. Default values: `hmac-sha2-256-etm@openssh.com`, `hmac-sha2-256`.
- `trusted_user_ca_keys`, list of public keys paths of certificate authorities that are trusted to sign user certificates for authentication. The paths can be absolute or relative to the configuration directory.

22
go.mod
View file

@ -9,14 +9,14 @@ require (
github.com/GehirnInc/crypt v0.0.0-20200316065508-bb7000b8a962
github.com/alexedwards/argon2id v0.0.0-20211130144151-3585854a6387
github.com/aws/aws-sdk-go-v2 v1.17.1
github.com/aws/aws-sdk-go-v2/config v1.18.0
github.com/aws/aws-sdk-go-v2/credentials v1.13.0
github.com/aws/aws-sdk-go-v2/config v1.18.1
github.com/aws/aws-sdk-go-v2/credentials v1.13.1
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.19
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.39
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.22
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.2
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.5
github.com/aws/aws-sdk-go-v2/service/sts v1.17.2
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.40
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.23
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.3
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.6
github.com/aws/aws-sdk-go-v2/service/sts v1.17.3
github.com/cockroachdb/cockroach-go/v2 v2.2.18
github.com/coreos/go-oidc/v3 v3.4.0
github.com/drakkan/webdav v0.0.0-20221101181759-17ed21f9337b
@ -66,7 +66,7 @@ require (
go.etcd.io/bbolt v1.3.6
go.uber.org/automaxprocs v1.5.1
gocloud.dev v0.27.0
golang.org/x/crypto v0.2.0
golang.org/x/crypto v0.3.0
golang.org/x/net v0.2.0
golang.org/x/oauth2 v0.2.0
golang.org/x/sys v0.2.0
@ -138,7 +138,7 @@ require (
github.com/mitchellh/mapstructure v1.5.0 // indirect
github.com/oklog/run v1.1.0 // indirect
github.com/pelletier/go-toml v1.9.5 // indirect
github.com/pelletier/go-toml/v2 v2.0.5 // indirect
github.com/pelletier/go-toml/v2 v2.0.6 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/power-devops/perfstat v0.0.0-20220216144756-c35f1ee13d7c // indirect
github.com/prometheus/client_model v0.3.0 // indirect
@ -158,7 +158,7 @@ require (
golang.org/x/tools v0.3.0 // indirect
golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
google.golang.org/appengine v1.6.7 // indirect
google.golang.org/genproto v0.0.0-20221114212237-e4508ebdbee1 // indirect
google.golang.org/genproto v0.0.0-20221116193143-41c2ba794472 // indirect
google.golang.org/grpc v1.50.1 // indirect
google.golang.org/protobuf v1.28.1 // indirect
gopkg.in/ini.v1 v1.67.0 // indirect
@ -169,5 +169,5 @@ require (
replace (
github.com/jlaffaye/ftp => github.com/drakkan/ftp v0.0.0-20201114075148-9b9adce499a9
golang.org/x/crypto => github.com/drakkan/crypto v0.0.0-20221020054403-a265c1cba3cb
golang.org/x/crypto => github.com/drakkan/crypto v0.0.0-20221117111000-a0321143587c
)

45
go.sum
View file

@ -233,17 +233,17 @@ github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.3/go.mod h1:gNsR5CaXK
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.9 h1:RKci2D7tMwpvGpDNZnGQw9wk6v7o/xSwFcUAuNPoB8k=
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.9/go.mod h1:vCmV1q1VK8eoQJ5+aYE7PkK1K6v41qJ5pJdK3ggCDvg=
github.com/aws/aws-sdk-go-v2/config v1.15.15/go.mod h1:A1Lzyy/o21I5/s2FbyX5AevQfSVXpvvIDCoVFD0BC4E=
github.com/aws/aws-sdk-go-v2/config v1.18.0 h1:ULASZmfhKR/QE9UeZ7mzYjUzsnIydy/K1YMT6uH1KC0=
github.com/aws/aws-sdk-go-v2/config v1.18.0/go.mod h1:H13DRX9Nv5tAcQvPABrE3dm5XnLp1RC7fVSM3OWiLvA=
github.com/aws/aws-sdk-go-v2/config v1.18.1 h1:wMzU9tBq/tEdTUcmB9WsYe5stdP0/EAf84vfeqS5S6A=
github.com/aws/aws-sdk-go-v2/config v1.18.1/go.mod h1:jQIgBmQJa5oPzTUtWMjFryPDCBlVqIgoFmdfFKLx4WE=
github.com/aws/aws-sdk-go-v2/credentials v1.12.10/go.mod h1:g5eIM5XRs/OzIIK81QMBl+dAuDyoLN0VYaLP+tBqEOk=
github.com/aws/aws-sdk-go-v2/credentials v1.13.0 h1:W5f73j1qurASap+jdScUo4aGzSXxaC7wq1i7CiwhvU8=
github.com/aws/aws-sdk-go-v2/credentials v1.13.0/go.mod h1:prZpUfBu1KZLBLVX482Sq4DpDXGugAre08TPEc21GUg=
github.com/aws/aws-sdk-go-v2/credentials v1.13.1 h1:HusGjp9C8zwu1SSEh3s501Llqr2xhn+FYKV5XMnOt6M=
github.com/aws/aws-sdk-go-v2/credentials v1.13.1/go.mod h1:C8xoJdzfQq/kl6gGIuJeHpcAaZnraJfTV9FoBgW1QYg=
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.9/go.mod h1:KDCCm4ONIdHtUloDcFvK2+vshZvx4Zmj7UMDfusuz5s=
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.19 h1:E3PXZSI3F2bzyj6XxUXdTIfvp425HHhwKsFvmzBwHgs=
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.19/go.mod h1:VihW95zQpeKQWVPGkwT+2+WJNQV8UXFfMTWdU6VErL8=
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.21/go.mod h1:iIYPrQ2rYfZiB/iADYlhj9HHZ9TTi6PqKQPAqygohbE=
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.39 h1:Fz/t08vTFdz63ZnlrQBLOMgBCNqdKmMQWE/XjKm1jt4=
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.39/go.mod h1:763L1Xloj/mjT0do5k9d0qh0vEAVuomDPn1iOG2AdB4=
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.40 h1:Q8Pshd76l1y24DSWJrQPyYY6xVNmpcsZHEfE9xZ4rpU=
github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.40/go.mod h1:rxGAF7fGMCse4bUVO+55P1mWCMCnUZPmh3LAnl0PZms=
github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.15/go.mod h1:pWrr2OoHlT7M/Pd2y4HV3gJyPb3qj5qMmnPkKSNPYK4=
github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.25 h1:nBO/RFxeq/IS5G9Of+ZrgucRciie2qpLy++3UGZ+q2E=
github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.25/go.mod h1:Zb29PYkf42vVYQY6pvSyJCJcFHlPIiY+YKdPtwnvMkY=
@ -269,14 +269,14 @@ github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.13.9/go.mod h1:Rc5+wn2
github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.13.19 h1:piDBAaWkaxkkVV3xJJbTehXCZRXYs49kvpi/LG6LR2o=
github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.13.19/go.mod h1:BmQWRVkLTmyNzYPFAZgon53qKLWBNSvonugD1MrSWUs=
github.com/aws/aws-sdk-go-v2/service/kms v1.18.1/go.mod h1:4PZMUkc9rXHWGVB5J9vKaZy3D7Nai79ORworQ3ASMiM=
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.22 h1:abXVcIh8pjiuWdPBk8vZYwxO5yZCmRHR8grHf6ZqCdY=
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.22/go.mod h1:mRGY+k3s1yt7yQA3AfzJhnr68OCs1xDfQfIABFUk+ek=
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.23 h1:NZKyAfM6J2OPehuSZI8woNGTxYi5jMkTDWGEFwR6/FA=
github.com/aws/aws-sdk-go-v2/service/marketplacemetering v1.13.23/go.mod h1:mRGY+k3s1yt7yQA3AfzJhnr68OCs1xDfQfIABFUk+ek=
github.com/aws/aws-sdk-go-v2/service/s3 v1.27.2/go.mod h1:u+566cosFI+d+motIz3USXEh6sN8Nq4GrNXSg2RXVMo=
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.2 h1:l29X5biLks99HzZzQgC78plJpwiMv/pGNhmaTM2z62A=
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.2/go.mod h1:/NHbqPRiwxSPVOB2Xr+StDEH+GWV/64WwnUjv4KYzV0=
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.3 h1:F6wgg8aHGNyhaAy2ONnWBThiPdLa386qNA0j33FIuSM=
github.com/aws/aws-sdk-go-v2/service/s3 v1.29.3/go.mod h1:/NHbqPRiwxSPVOB2Xr+StDEH+GWV/64WwnUjv4KYzV0=
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.15.14/go.mod h1:xakbH8KMsQQKqzX87uyyzTHshc/0/Df8bsTneTS5pFU=
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.5 h1:De+sGzRmk6+/lzKqZXa6RdC1ZVGLPHI1nvjOxw4ooj0=
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.5/go.mod h1:k6CPuxyzO247nYEM1baEwHH1kRtosRCvgahAepaaShw=
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.6 h1:TMIXEKw1ak/OPXGBTwBORU4aR921XFbj7pFsDPn45go=
github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.16.6/go.mod h1:k6CPuxyzO247nYEM1baEwHH1kRtosRCvgahAepaaShw=
github.com/aws/aws-sdk-go-v2/service/sns v1.17.10/go.mod h1:uITsRNVMeCB3MkWpXxXw0eDz8pW4TYLzj+eyQtbhSxM=
github.com/aws/aws-sdk-go-v2/service/sqs v1.19.1/go.mod h1:A94o564Gj+Yn+7QO1eLFeI7UVv3riy/YBFOfICVqFvU=
github.com/aws/aws-sdk-go-v2/service/ssm v1.27.6/go.mod h1:fiFzQgj4xNOg4/wqmAiPvzgDMXPD+cUEplX/CYn+0j0=
@ -286,8 +286,8 @@ github.com/aws/aws-sdk-go-v2/service/sso v1.11.25/go.mod h1:IARHuzTXmj1C0KS35vbo
github.com/aws/aws-sdk-go-v2/service/ssooidc v1.13.8 h1:jcw6kKZrtNfBPJkaHrscDOZoe5gvi9wjudnxvozYFJo=
github.com/aws/aws-sdk-go-v2/service/ssooidc v1.13.8/go.mod h1:er2JHN+kBY6FcMfcBBKNGCT3CarImmdFzishsqBmSRI=
github.com/aws/aws-sdk-go-v2/service/sts v1.16.10/go.mod h1:cftkHYN6tCDNfkSasAmclSfl4l7cySoay8vz7p/ce0E=
github.com/aws/aws-sdk-go-v2/service/sts v1.17.2 h1:tpwEMRdMf2UsplengAOnmSIRdvAxf75oUFR+blBr92I=
github.com/aws/aws-sdk-go-v2/service/sts v1.17.2/go.mod h1:bXcN3koeVYiJcdDU89n3kCYILob7Y34AeLopUbZgLT4=
github.com/aws/aws-sdk-go-v2/service/sts v1.17.3 h1:WMAsVk4yQTHOZ2m7dFnF5Azr/aDecBbpWRwc+M6iFIM=
github.com/aws/aws-sdk-go-v2/service/sts v1.17.3/go.mod h1:bXcN3koeVYiJcdDU89n3kCYILob7Y34AeLopUbZgLT4=
github.com/aws/smithy-go v1.12.0/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
github.com/aws/smithy-go v1.13.4 h1:/RN2z1txIJWeXeOkzX+Hk/4Uuvv7dWtCjbmVJcrskyk=
github.com/aws/smithy-go v1.13.4/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
@ -536,8 +536,8 @@ github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDD
github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM=
github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
github.com/drakkan/crypto v0.0.0-20221020054403-a265c1cba3cb h1:ex3x8ir969oV6bQ8fBYlaw1DXKGZCOM560bdeqeDJ/Y=
github.com/drakkan/crypto v0.0.0-20221020054403-a265c1cba3cb/go.mod h1:IBSs4ri4rdTqz2QKcpTKpwKMdM+WJ7atZeL9lCu2swQ=
github.com/drakkan/crypto v0.0.0-20221117111000-a0321143587c h1:3lJRXQcGw8fnheQ9ORGYE17JLuYzu6FkDuK8MZwqeRQ=
github.com/drakkan/crypto v0.0.0-20221117111000-a0321143587c/go.mod h1:z/3TjBrBT/Dch7NfsgFg7f07WiGYZVYQgnxGHacCvRc=
github.com/drakkan/ftp v0.0.0-20201114075148-9b9adce499a9 h1:LPH1dEblAOO/LoG7yHPMtBLXhQmjaga91/DDjWk9jWA=
github.com/drakkan/ftp v0.0.0-20201114075148-9b9adce499a9/go.mod h1:2lmrmq866uF2tnje75wQHzmPXhmSWUt7Gyx2vgK1RCU=
github.com/drakkan/webdav v0.0.0-20221101181759-17ed21f9337b h1:B9z7XyDoVxLO4yEvnXgdvZ+0Uw9NA1qdD4KTSGmKcoQ=
@ -1059,7 +1059,6 @@ github.com/klauspost/compress v1.15.1/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47e
github.com/klauspost/compress v1.15.12 h1:YClS/PImqYbn+UILDnqxQCZ3RehC9N318SU3kElDUEM=
github.com/klauspost/compress v1.15.12/go.mod h1:QPwzmACJjUTFsnSHH934V6woptycfrDDJnH7hvFVbGM=
github.com/klauspost/cpuid/v2 v2.0.4/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
github.com/klauspost/cpuid/v2 v2.1.2/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
github.com/klauspost/cpuid/v2 v2.2.1 h1:U33DW0aiEj633gHYw3LoDNfkDiYnE5Q8M/TKJn2f2jI=
github.com/klauspost/cpuid/v2 v2.2.1/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
github.com/kolo/xmlrpc v0.0.0-20201022064351-38db28db192b/go.mod h1:pcaDhQK0/NJZEvtCO0qQPPropqV0sJOJ6YW7X+9kRwM=
@ -1313,8 +1312,8 @@ github.com/pelletier/go-toml v1.8.1/go.mod h1:T2/BmBdy8dvIRq1a/8aqjN41wvWlN4lrap
github.com/pelletier/go-toml v1.9.3/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
github.com/pelletier/go-toml/v2 v2.0.5 h1:ipoSadvV8oGUjnUbMub59IDPPwfxF694nG/jwbMiyQg=
github.com/pelletier/go-toml/v2 v2.0.5/go.mod h1:OMHamSCAODeSsVrwwvcJOaoN0LIUIaFVNZzmWyNfXas=
github.com/pelletier/go-toml/v2 v2.0.6 h1:nrzqCb7j9cDFj2coyLNLaZuJTLjWjlaz6nvTvIwycIU=
github.com/pelletier/go-toml/v2 v2.0.6/go.mod h1:eumQOmlWiOPt5WriQQqoM5y18pDHwha2N+QD+EUNTek=
github.com/performancecopilot/speed v3.0.0+incompatible/go.mod h1:/CLtqpZ5gBg1M9iaPbIdPPGyKcA8hKdoy6hAWba7Yac=
github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
github.com/pierrec/lz4 v1.0.2-0.20190131084431-473cd7ce01a1/go.mod h1:3/3N9NVKO0jef7pBehbT1qWhCMrIgbYNnFAZCqQ5LRc=
@ -1812,7 +1811,6 @@ golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e/go.mod h1:XRhObCWvk6IyKnWLug
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.0.0-20220802222814-0bcc04d9c69b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@ -2004,15 +2002,14 @@ golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBc
golang.org/x/sys v0.0.0-20220731174439-a90be440212d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210220032956-6a3ed077a48d/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.2.0 h1:z85xZCsEl7bi/KwbNADeBYoOP0++7W1ipu+aGnpwzRM=
golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@ -2295,8 +2292,8 @@ google.golang.org/genproto v0.0.0-20220617124728-180714bec0ad/go.mod h1:KEWEmljW
google.golang.org/genproto v0.0.0-20220624142145-8cd45d7dbd1f/go.mod h1:KEWEmljWE5zPzLBa/oHl6DaEt9LmfH6WtH1OHIvleBA=
google.golang.org/genproto v0.0.0-20220628213854-d9e0b6570c03/go.mod h1:KEWEmljWE5zPzLBa/oHl6DaEt9LmfH6WtH1OHIvleBA=
google.golang.org/genproto v0.0.0-20220802133213-ce4fa296bf78/go.mod h1:iHe1svFLAZg9VWz891+QbRMwUv9O/1Ww+/mngYeThbc=
google.golang.org/genproto v0.0.0-20221114212237-e4508ebdbee1 h1:jCw9YRd2s40X9Vxi4zKsPRvSPlHWNqadVkpbMsCPzPQ=
google.golang.org/genproto v0.0.0-20221114212237-e4508ebdbee1/go.mod h1:rZS5c/ZVYMaOGBfO68GWtjOw/eLaZM1X6iVtgjZ+EWg=
google.golang.org/genproto v0.0.0-20221116193143-41c2ba794472 h1:kIfItBRE5gkUKpH4H5lNGciZbka1JrmRli3ArqrKFkA=
google.golang.org/genproto v0.0.0-20221116193143-41c2ba794472/go.mod h1:rZS5c/ZVYMaOGBfO68GWtjOw/eLaZM1X6iVtgjZ+EWg=
google.golang.org/grpc v0.0.0-20160317175043-d3ddb4469d5a/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=

View file

@ -253,6 +253,7 @@ func Init() {
HostKeys: []string{},
HostCertificates: []string{},
HostKeyAlgorithms: []string{},
Moduli: []string{},
KexAlgorithms: []string{},
Ciphers: []string{},
MACs: []string{},
@ -1961,6 +1962,7 @@ func setViperDefaults() {
viper.SetDefault("sftpd.host_keys", globalConf.SFTPD.HostKeys)
viper.SetDefault("sftpd.host_certificates", globalConf.SFTPD.HostCertificates)
viper.SetDefault("sftpd.host_key_algorithms", globalConf.SFTPD.HostKeyAlgorithms)
viper.SetDefault("sftpd.moduli", globalConf.SFTPD.Moduli)
viper.SetDefault("sftpd.kex_algorithms", globalConf.SFTPD.KexAlgorithms)
viper.SetDefault("sftpd.ciphers", globalConf.SFTPD.Ciphers)
viper.SetDefault("sftpd.macs", globalConf.SFTPD.MACs)

View file

@ -1926,6 +1926,30 @@ func TestSupportedSecurityOptions(t *testing.T) {
assert.Equal(t, supportedKexAlgos, serverConfig.KeyExchanges)
}
func TestLoadModuli(t *testing.T) {
dhGEXSha1 := "diffie-hellman-group-exchange-sha1"
dhGEXSha256 := "diffie-hellman-group-exchange-sha256"
c := Configuration{}
c.Moduli = []string{".", "missing file"}
err := c.loadModuli(configDir)
assert.Error(t, err)
assert.NotContains(t, supportedKexAlgos, dhGEXSha1)
assert.NotContains(t, supportedKexAlgos, dhGEXSha256)
assert.Len(t, supportedKexAlgos, 10)
moduli := []byte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
moduliFile := filepath.Join(os.TempDir(), "moduli")
err = os.WriteFile(moduliFile, moduli, 0600)
assert.NoError(t, err)
c.Moduli = []string{moduliFile}
err = c.loadModuli(configDir)
assert.NoError(t, err)
assert.Contains(t, supportedKexAlgos, dhGEXSha1)
assert.Contains(t, supportedKexAlgos, dhGEXSha256)
assert.Len(t, supportedKexAlgos, 12)
err = os.Remove(moduliFile)
assert.NoError(t, err)
}
func TestLoadHostKeys(t *testing.T) {
serverConfig := &ssh.ServerConfig{}
c := Configuration{}

View file

@ -141,6 +141,12 @@ type Configuration struct {
// HostKeyAlgorithms lists the public key algorithms that the server will accept for host
// key authentication.
HostKeyAlgorithms []string `json:"host_key_algorithms" mapstructure:"host_key_algorithms"`
// Diffie-Hellman moduli files.
// Each moduli file can be defined as a path relative to the configuration directory or an absolute one.
// If set, "diffie-hellman-group-exchange-sha256" and "diffie-hellman-group-exchange-sha1" KEX algorithms
// will be available, `diffie-hellman-group-exchange-sha256` will be enabled by default if you
// don't explicitly set KEXs
Moduli []string `json:"moduli" mapstructure:"moduli"`
// KexAlgorithms specifies the available KEX (Key Exchange) algorithms in
// preference order.
KexAlgorithms []string `json:"kex_algorithms" mapstructure:"kex_algorithms"`
@ -294,6 +300,10 @@ func (c *Configuration) Initialize(configDir string) error {
return err
}
if err := c.loadModuli(configDir); err != nil {
return err
}
sftp.SetSFTPExtensions(sftpExtensions...) //nolint:errcheck // we configure valid SFTP Extensions so we cannot get an error
if err := c.configureSecurityOptions(serverConfig); err != nil {
@ -840,6 +850,29 @@ func (c *Configuration) checkHostKeyAutoGeneration(configDir string) error {
return nil
}
func (c *Configuration) loadModuli(configDir string) error {
supportedKexAlgos = util.Remove(supportedKexAlgos, "diffie-hellman-group-exchange-sha1")
supportedKexAlgos = util.Remove(supportedKexAlgos, "diffie-hellman-group-exchange-sha256")
for _, m := range c.Moduli {
m = strings.TrimSpace(m)
if !util.IsFileInputValid(m) {
logger.Warn(logSender, "", "unable to load invalid moduli file %q", m)
logger.WarnToConsole("unable to load invalid host moduli file %q", m)
continue
}
if !filepath.IsAbs(m) {
m = filepath.Join(configDir, m)
}
logger.Info(logSender, "", "loading moduli file %q", m)
if err := ssh.ParseModuli(m); err != nil {
return err
}
supportedKexAlgos = append(supportedKexAlgos, "diffie-hellman-group-exchange-sha1",
"diffie-hellman-group-exchange-sha256")
}
return nil
}
// If no host keys are defined we try to use or generate the default ones.
func (c *Configuration) checkAndLoadHostKeys(configDir string, serverConfig *ssh.ServerConfig) error {
if err := c.checkHostKeyAutoGeneration(configDir); err != nil {
@ -853,14 +886,14 @@ func (c *Configuration) checkAndLoadHostKeys(configDir string, serverConfig *ssh
for _, hostKey := range c.HostKeys {
hostKey = strings.TrimSpace(hostKey)
if !util.IsFileInputValid(hostKey) {
logger.Warn(logSender, "", "unable to load invalid host key %#v", hostKey)
logger.WarnToConsole("unable to load invalid host key %#v", hostKey)
logger.Warn(logSender, "", "unable to load invalid host key %q", hostKey)
logger.WarnToConsole("unable to load invalid host key %q", hostKey)
continue
}
if !filepath.IsAbs(hostKey) {
hostKey = filepath.Join(configDir, hostKey)
}
logger.Info(logSender, "", "Loading private host key %#v", hostKey)
logger.Info(logSender, "", "Loading private host key %q", hostKey)
privateBytes, err := os.ReadFile(hostKey)
if err != nil {

View file

@ -401,6 +401,12 @@ func TestInitialization(t *testing.T) {
assert.True(t, sftpdConf.Bindings[0].HasProxy())
err = sftpdConf.Initialize(configDir)
assert.Error(t, err)
sftpdConf.Moduli = []string{"missing moduli file"}
err = sftpdConf.Initialize(configDir)
if assert.Error(t, err) {
assert.Contains(t, err.Error(), "unable to open moduli file")
}
sftpdConf.Moduli = nil
sftpdConf.HostKeys = []string{"missing key"}
err = sftpdConf.Initialize(configDir)
assert.Error(t, err)

View file

@ -125,6 +125,18 @@ func Contains[T comparable](elems []T, v T) bool {
return false
}
// Remove removes an element from a string slice and
// returns the modified slice
func Remove(elems []string, val string) []string {
for idx, v := range elems {
if v == val {
elems[idx] = elems[len(elems)-1]
return elems[:len(elems)-1]
}
}
return elems
}
// IsStringPrefixInSlice searches a string prefix in a slice and returns true
// if a matching prefix is found
func IsStringPrefixInSlice(obj string, list []string) bool {

View file

@ -84,6 +84,7 @@
"host_keys": [],
"host_certificates": [],
"host_key_algorithms": [],
"moduli": [],
"kex_algorithms": [],
"ciphers": [],
"macs": [],